Good for you, Sue - sounding stronger and more in control of your life every day.
Keep in mind that everything you hear about OW is heavily filtered - either through the perceptions of your H, or of her H. I suspect that neither of them really has any CLUE what is going on in her MLC-crazed head, and when they try to tell you stuff like she is "wavering on seeing a C" - well, take all of that with one ginormous grain of salt.
I feel bad for OW's H, I truly do. Way back when, it seemed like he was on a path similar to yours of improving himself and trying to save his M. When you now say he is "desperately trying to hold on to his family", what I picture is someone who is still at the panicky begging and pleading and pursuing stage of their sitch. If that's the case, maybe point him to DBing - 'cause whatever he's been trying ain't working.
If you do that, I would just say "Here's something that has helped me a lot" and then leave him to his own devices. I would strongly advise that you do NOT become his "guru" or anything like that - things will almost certainly get too tangled up. There are plenty of other places he can get help, including right here on the boards, without it becoming "your" problem.
Thread #10 22 year M, MLC, Piecing since 1/07 Goal: Live with confidence & enthusiasm!